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ZAFGEN INC
ZAFGEN INC. Institutional holdings reported to the SEC.

Institutional Holders (2016Q1)
Portfolio Summary: 4 Institutional holders with a total value of $1,557,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 1,446 966,000 62.04% Call
2 GROUP ONE TRADING LLC 77,300 516,000 33.14% Call
3 EcoR1 Capital, LLC 10,000 67,000 4.30% Call
4 SIMPLEX TRADING, LLC 107 8,000 0.51% Call

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.